LP402L Laser Electronic Theodolite

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LP402L Laser Electronic Theodolite

Product ID：CLCDqtOther031

Price: Please inquire PDF Format

Supply Ability:50 SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberLP402L

Brand NameSZYIGUANG

Payment TermsTT，PAYPAL，Alibaba.com Pay

LP402L Laser Electronic Theodolite
Product Introduction
LP402L Laser Electronic Theodolite is a high-precision surveying instrument that combines a digital electronic theodolite with an integrated coaxial laser projection system. Based on the DT400 series electronic theodolite platform, the LP402L adds a visible laser emission function through the telescope, enabling accurate laser alignment, positioning, vertical projection, and leveling operations.
The laser beam is coaxial and confocal with the telescope collimation axis, allowing operators to observe and control the laser direction directly through the telescope. With optional bending eyepiece configuration, the instrument can project a vertical laser beam toward the zenith and perform vertical angle measurement, making it suitable as a laser plummet instrument.
When the telescope is accurately adjusted to the horizontal position, LP402L can also be used as a laser level and laser plane alignment instrument. Without activating the laser function, it works as a conventional electronic theodolite for precision angle measurement.

Key Features
• Integrated Coaxial Laser Design
The laser emission system is integrated with the telescope, providing a compact structure, improved alignment accuracy, and a professional appearance.
• Visible Laser Spot Observation Through Telescope
The laser point can be directly observed through the eyepiece. Operators can simultaneously view the target and laser spot inside the telescope field of view for precise positioning.
• High Precision Absolute Encoding Angle Measurement
Equipped with an absolute encoder system for stable and accurate horizontal and vertical angle measurement.
• Dual Laser Functions
Supports both laser pointing and laser plummet functions to meet different engineering surveying requirements.
• High Resolution Dual-Sided LCD Display
Two-sided display design allows convenient operation from different working positions.
• Standard Communication Interface
Built-in RS-232C communication interface enables connection with external data collectors and field controllers.
• Long Working Time Power System
Supports rechargeable battery and dry battery operation for extended outdoor surveying.
• Wide Operating Temperature Range
Designed for demanding field environments with reliable performance from -20℃ to +50℃.

Working Principle
LP402L Laser Electronic Theodolite combines electronic angle measurement technology with laser projection technology.
The instrument uses an absolute encoder system to measure horizontal and vertical angles digitally. A semiconductor laser module generates a visible 635nm laser beam, which is transmitted through the telescope optical system.
Because the laser axis is designed to be coaxial with the telescope optical axis, the emitted laser direction remains consistent with the telescope aiming direction. This allows surveyors to accurately perform:
• Point alignment
• Construction positioning
• Vertical transfer
• Elevation reference marking
• Laser leveling operations
The automatic compensator system detects instrument tilt and automatically corrects vertical angle measurement errors within the compensation range.

Technical Parameters

Parameter	Specification
Angle Measurement
Minimum Reading	1″
Accuracy	2″
Telescope
Objective Aperture	45mm
Magnification	30×
Image Type	Erect image
Field of View	1°30′
Minimum Focusing Distance	1.0m
Display	Dual-sided LCD
Illumination	Reticle illumination available
Laser Emission System
Laser Type	Semiconductor laser
Laser Wavelength	635nm
Effective Range (Daylight)	200m
Laser Spot Size	5mm / 100m
Laser Axis Deviation	≤5″
Plummet System
Optical Plummet (Optional)	LP402, Field angle 4°, Magnification 3×
Laser Plummet (Standard)	LP402L, 635nm laser, focusing distance 0.5m, range 80m
Compensator
Sensor Type	Automatic vertical compensation
Compensation Range	±3′
Bubble Level
Plate Level	30″/2mm
Circular Level	8′/2mm
Power Supply
Battery Type	6V Ni-MH battery
Operating Time	15 hours
Communication	RS-232C
Dimensions	153 × 175 × 328 mm
Operating Temperature	-20℃ to +50℃
Weight	4.5kg

Applications
LP402L Laser Electronic Theodolite is widely used in construction, surveying, engineering installation, and industrial measurement fields.
Typical applications include:
• Building construction alignment and positioning
• Bridge and tunnel engineering surveying
• Vertical structure alignment
• Foundation and column positioning
• Industrial equipment installation
• Precision engineering measurement
• Land surveying and mapping
• Laser vertical transfer operations
• Elevation and leveling reference measurement

LP402L Laser Electronic Theodolite vs Traditional Theodolite

Comparison Item	LP402L Laser Electronic Theodolite	Traditional Electronic Theodolite
Laser Function	Integrated coaxial laser projection	Not available
Alignment Method	Telescope + visible laser guidance	Optical aiming only
Vertical Transfer	Supported with laser plummet function	Requires additional equipment
Leveling Application	Can work as laser level	Limited
Operation Efficiency	Faster positioning and alignment	Manual alignment required
Application Range	Surveying + construction + laser positioning	Mainly angle measurement

Frequently Asked Questions (FAQ)
1. What is a laser electronic theodolite used for?
A laser electronic theodolite is mainly used for precision angle measurement, construction alignment, vertical positioning, and engineering surveying. The integrated laser function improves efficiency in field operations.
2. What is the difference between LP402L and a normal electronic theodolite?
The LP402L adds a coaxial visible laser system to a traditional electronic theodolite. It can provide laser pointing, vertical projection, and leveling functions while maintaining electronic angle measurement capability.
3. Can LP402L be used as a laser level?
Yes. When the telescope is accurately adjusted to the horizontal position, LP402L can function as a laser leveling and laser plane alignment instrument.
4. What is the laser range of LP402L?
The laser effective range can reach 200m in daylight conditions. The laser plummet function has a range of approximately 80m.
5. Is LP402L suitable for outdoor construction environments?
Yes. The instrument operates reliably in temperatures from -20℃ to +50℃ and is designed for professional outdoor surveying applications.
6. Does LP402L support external data collectors?
Yes. It is equipped with an RS-232C communication interface for connection with external field data collectors and surveying controllers.

Product Advantages Summary
LP402L Laser Electronic Theodolite provides a combination of precision angle measurement, laser alignment, vertical projection, and leveling functions in one instrument. Its coaxial laser design, high accuracy measurement system, and versatile operating modes make it an efficient solution for modern construction surveying and engineering measurement projects.

Frequently Asked Questions (FAQ)
1. What is a laser electronic theodolite used for?
A laser electronic theodolite is mainly used for precision angle measurement, construction alignment, vertical positioning, and engineering surveying. The integrated laser function improves efficiency in field operations.
2. What is the difference between LP402L and a normal electronic theodolite?
The LP402L adds a coaxial visible laser system to a traditional electronic theodolite. It can provide laser pointing, vertical projection, and leveling functions while maintaining electronic angle measurement capability.
3. Can LP402L be used as a laser level?
Yes. When the telescope is accurately adjusted to the horizontal position, LP402L can function as a laser leveling and laser plane alignment instrument.
4. What is the laser range of LP402L?
The laser effective range can reach 200m in daylight conditions. The laser plummet function has a range of approximately 80m.
5. Is LP402L suitable for outdoor construction environments?
Yes. The instrument operates reliably in temperatures from -20℃ to +50℃ and is designed for professional outdoor surveying applications.
6. Does LP402L support external data collectors?
Yes. It is equipped with an RS-232C communication interface for connection with external field data collectors and surveying controllers.